https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108630
Bug ID: 108630
Summary: build failure with LTO enabled
Product: gcc
Version: 12.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: a.heider at gmail dot com
Target Milestone: ---
This is happening when attempting to build a cross compiler with:
CFLAGS_FOR_TARGET="-flto=auto -ffat-lto-objects"
LDFLAGS_FOR_TARGET="-flto=auto -fuse-linker-plugin"
The assembler errors out when building libstdc++ with:
Error: invalid attempt to declare external version name as default in symbol
`_ZNSt19istreambuf_iteratorIcSt11char_traitsIcEEppEv@@GLIBCXX_3.4.5'
The build succeed when building with an additional --enable-symvers=no on top.
libstdc++ may need the same treatment as seen e.g. here:
https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=f4be26838dc9937a4ae3e9cf4fbec50efd7786a2
